DE102008058998B4 - Process for the screening or classification of cut, vegetable bulk material, in particular tobacco, and apparatus for carrying out the process - Google Patents

Process for the screening or classification of cut, vegetable bulk material, in particular tobacco, and apparatus for carrying out the process Download PDF

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Publication number
DE102008058998B4
DE102008058998B4 DE102008058998.5A DE102008058998A DE102008058998B4 DE 102008058998 B4 DE102008058998 B4 DE 102008058998B4 DE 102008058998 A DE102008058998 A DE 102008058998A DE 102008058998 B4 DE102008058998 B4 DE 102008058998B4
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Prior art keywords
bulk
air flow
conveyor
chute
loosening
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DE102008058998.5A
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German (de)
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DE102008058998A1 (en
Inventor
Franz Sagemüller
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Franz Sagemueller GmbH
SAGEMUELLER FRANZ GmbH
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Franz Sagemueller GmbH
SAGEMUELLER FRANZ GmbH
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14Details or accessories
    • B07B13/16Feed or discharge arrangements

Abstract

A method for screening or classifying sliced plant bulk material, such as herbs, tobacco or the like, in which the bulk material is brought by means of a continuous conveyor in a vertically upward air flow and within the air stream in a swirl-free floating possible, not levitating parts a heavy fraction of the bulk material are separated from the air flow by precipitation and parts of a light fraction of the bulk material from the air flow and discharged, characterized in that in the input of the bulk material in the air stream by means of a dedicated loosening organ (9) acted on Schüttgutknäuel mechanically is detected by the ball loom from the loosening member (9) and thrown back against the conveying direction of the feed in the air flow continuous conveyor, and that as a continuous conveyor, a vibrating conveyor is used ,

Description

  • The invention relates to a method for the screening or classification of bulk material, in particular sliced, plant bulk material, such as herbs, tobacco or the like.
  • The invention also relates to a device for carrying out the aforementioned method.
  • Vegetable bulk, in particular tobacco, consists essentially of more or less light and thus sensitive, but valuable leaf constituents, but also of less valuable ribs and stems, with varying dimensions.
  • Before the further processing of the tobacco, but also the herbs, such as aromatic plants, medicinal herbs and the like, a classification of the individual components is required. Conveniently, the classification is carried out after the plant parts have been jointly supplied to a cutting station and have undergone a cutting operation. The plant material accumulating there mainly contains particles of the same size.
  • The cut particles of the plant material are the bulk material, which must be classified in preparation for further processing measures and finally homogenized, so that a uniform product quality can always be supplied to the individual, subsequent processing stations. The classification or classification is therefore a mandatory requirement for the production of a pourable end product with the same composition or quality.
  • For the classification of sliced bulk material, in particular tobacco plants, the bulk material is brought with a continuous conveyor in a vertically upward air flow. Within the air flow there is a levitation of the introduced bulk material, which should be as free as possible from eddy. This ensures best a laminar air flow.
  • In a kind of fluidized layer, the heavier components of the bulk material will seep down from the top to the bottom of the air stream from layer to layer. The heavy fraction of the bulk material is thus separated by precipitation, accumulates in the lower part of the air flow and can optionally be discharged from there.
  • Parts of the light fraction of the input into the air flow bulk material, however, are carried by the air flow and discharged by separation from the air flow.
  • The latter is possible in a manner known per se by means of a corresponding reduction in the flow rate of the air stream, e.g. at cross-sectional extensions in a line carrying the air flow.
  • Light components are thus separated from the remaining bulk material and can be sorted and collected fed to a corresponding processing.
  • These separations of heavy fraction and light fraction, as well as the feeding of the bulk material, are continuous and can be controlled as a function of the flow rate.
  • For introducing the bulk material into the air flow, a vibrating conveyor is expediently used. Vibratory conveyors have the advantage that set intensive shear movements within the conveyed bulk material through which there is already a certain separation of the parts within the vibrating bulk material flow. The bulk material separates on the vibratory conveyor already in layers, which are then entered continuously in the vertically upward air flow.
  • The transport of the bulk material along the conveying path through the vibrating conveyor thus already causes a preclassification of the plant bulk material, in particular the tobacco.
  • The individual fractions of the bulk material supplied to the air flow are thus pre-classified and thereby arrive separated from one another in the air flow, in which then a further classification of the constituents of the bulk material takes place.
  • The desirable preservation of the systematic relationship between the self-classifying layers due to the shear resonance in the bulk material during transport on the vibratory conveyor is maintained and continued during the course of the sighting process within the upward airflow.
  • The bulk material to be classified tends to have a certain entanglement, in particular of the constituents which are initially somewhat more difficult to carry along within the air stream, which are swirled back or which have entangled with other constituents of the light fraction, ie have "matted" and thus float downwards in the air flow or can sag.
  • A generic method is from the DE 697 12 632 T2 known. From the DE 453 358 is still a device known in the with a loosening organ is mechanically acted on Schüttgutknäuel.
  • The invention has for its object to dissolve such entangled or matted ingredients and also to develop bulk material contained therein and to supply the classification.
  • This object is procedurally achieved by the features of claim 1, as well as device by the features of claim 3.
  • Further developments and advantageous embodiments of the method will become apparent from the dependent claim 2, as well as device from the dependent claims 4 to 6.
  • Tangled or felted parts of the bulk material can fall back in the process according to the invention, e.g. on a subordinate to the continuous conveyor grate, and get back into the input area of the bulk material in the air flow.
  • There is provided with particular advantage a mechanically acting on such Schüttgutknäuel loosening organ. The loosening member is thus brought into effect in the region of the discharge-side end of the grate and, based on the direction of the vertical air flow through the grate, above the grate.
  • As a loosening organ a reel body with radial prongs is particularly suitable. Of course, several reel body can be arranged with radial tines on the grate.
  • Residual bundles of bulk material lying on the grate are picked up by the loosening element, loosened up and thrown back against the conveying direction of the continuous conveyor. The tangles and entanglements are dissolved in an advantageous manner and again exposed to the attack of the air flow for the purpose of classification. This process is repeated in combination with tracked, fresh bulk material continuously, so that the classification process can run continuously with high efficiency.
  • An apparatus for carrying out the method is characterized in that the region of the bulk material input into the chute has at least one loosening member acting against the conveying direction of a conveyor feeding the bulk material into the chute, which is located in the area of the discharge-side end of a grate downstream of the conveyor is arranged on the direction of vertical air flow in the chute, above the grate, and that the conveyor is designed as a vibratory conveyor.
  • With the help of the lateral opening, bulk material can be introduced into the vertical chute, in which a consequently substantially vertical air flow, which is generated and maintained by means of the blower, flows.
  • Particularly suitable is a square chute, for example rectangular or square in cross section. The blower is adjusted or regulated in such a way that as laminar a flow of air as possible is established over the entire height of the chute. The air flow can be generated by an air stream generated by the blower is focused bundled into the chute and flows through a bottleneck at the upper end of the chute, so that the flow rate increases. This creates a negative pressure in the area below the chute, which sucks air flowing in via the lower end of the chute together with bulk material entered via the vibrating chute.
  • The continuous conveyor for the bulk material introduction is designed with particular advantage as a vibrating conveyor, which has a connected to the lateral opening of the chute vibration bar. The connected to the opening end of the vibration bar is thereby extended into the chute into it and extending into the chute extension is formed as a rust.
  • The design is such that the rust almost completely fills the free cross section of the chute in the bulk material introduction.
  • Bulk material fed from the vibrating trough reaches the grate, through which air flows from below. The vibrating grate sieves heavy components of the supplied bulk material, which fall as a heavy fraction down and can be collected, for example, in a collecting container.
  • The grate preferably consists of a multiplicity of bars aligned parallel to one another in the conveying direction. This ensures that supplied bulk material can slide relatively easily over the bars of the vibrating grate. Since the rods are flowed through from below with air, the air can entrain on the rods lying bulk, which can be dissolved and discharged in individual parts.
  • The distance between the bars of the grate is chosen so that the coarsest parts of the supplied bulk material can still fall through.
  • With reference to the direction of fall in the chute, at least one loosening element acting against the conveying direction of the conveyor is arranged above the vibrating grate protruding into the chute. This loosening organ is intended to work on the grid lying or falling back on the grate bulk bag and loosen up again. The thereby exposed or accruing parts of the bulk material can then either fall through the grid down and be sorted out or carried along with the air flow and discharged.
  • With particular advantage, each loosening organ has at least one comb-like computing element. Comb-acting computing elements are particularly suitable for dissolving ball-like bulk material structures, in particular if they can be moved by means of a mechanism.
  • Each comb-like computing element is advantageously designed as a reel body with radially projecting tines, wherein a rotary drive is provided. The rotary drive can, for example, have a simple electric motor with a corresponding gear, via which the rotational speed of the loosening element designed as a reel body can also be varied. Thus, the device according to the invention is readily adaptable to different bulk materials. The device works continuously with not inconsiderable throughput of plant material.
  • To avoid dust emissions and appropriate filter systems can be integrated into the air outlet of the device.
  • The entangled bulk material is accelerated by the loosening member back into the visual flow, so as to make the felted structure gradually accessible in a targeted feedback and to extract the heavier components still hidden there.
  • As with conventional, pneumatic classifications, in the method according to the invention and by the device according to the invention a uniform charge, as well as a stable air flow as a crucial prerequisite for the systematic connection of the viewing while maintaining its spatial cohesion, given.
  • An embodiment of the invention, from which further inventive features arise, is shown in the drawing.
  • The drawing shows a schematic side view of a device for screening or classification of cut tobacco.
  • The device consists of a substantially vertically extending chute 1 , The chute has a lower free opening 2 on and is at the top with a rejuvenation 3 equipped, in the area of the outlet 4 a laterally arranged fan not shown here opens.
  • The blower carries a continuous stream of air into the chute 1 one up through the narrowing 3 flows away and is thereby significantly accelerated. This air is entrained from the chute, so that forms an air flow from bottom to top in the chute. Through the lower free opening 2 of the chute flows continuously supplied from outside air to replace the part of the air in the chute, which was entrained by the air supplied by the blower and discharged.
  • The essentially vertical chute 1 has a side opening 5 for a bulk material introduction. The bulk material introduction is as a vibratory conveyor 6 formed, one at the side opening 5 of the chute 1 connected vibration bar 7 has, whose to the opening 5 connected end in the chute 1 is extended into it. This is in the chute 1 extending extension is called rust 8th educated. The grate fills the free cross section of the chute in the area of the opening 5 for the bulk material introduction almost completely. A necessary gap between the grate and the inner walls of the chute is not greater than the vibration amplitude of the vibration bar 7 of the vibratory conveyor 6 so that the vibrations of the vibratory conveyor can not be transferred to the chute.
  • The grate 8 consists of a plurality of parallel juxtaposed in the conveying direction bars, which are not shown here.
  • Relative to the fall direction in the chute is above the swinging grate 8th a loosening member acting against the conveying direction of the grate 9 arranged. The loosening organ has at least one comb-like acting computing element, here as a reel body 10 is formed with radially projecting tines. Each loosening member is equipped with a rotary drive not shown, the reel body 10 the loosening organ offset in here counterclockwise rotational movements.
  • By the rotational movements, the supplied material is constantly thrown back against the conveying direction of the vibrating conveyor and in a kind of feedback is a matted structure that has fallen back on the grid, or lying on it, loosened and gradually made accessible.
  • With 11 is a collection designated for the precipitated heavy fraction of bulk material.

Claims (6)

  1. A method for screening or classifying sliced plant bulk material, such as herbs, tobacco or the like, in which the bulk material is brought by means of a continuous conveyor in a vertically upward air flow and within the air stream in a swirl-free floating possible, not levitating parts a heavy fraction of the bulk material are separated from the air flow by precipitation and parts of a light fraction of the bulk material from the air flow and discharged, characterized in that in the input of the bulk material in the air stream by means of a dedicated loosening organ (9) acted on Schüttgutknäuel mechanically is detected by the ball looser of the loosening member (9) and are reflected back against the conveying direction of the input into the air flow continuous conveyor, and that as a continuous conveyor, we use a vibrating conveyor d.
  2. Method according to Claim 1 , characterized in that a reel body (10) with radial prongs is used as loosening member (9).
  3. Device for the screening of cut bulk material, such as herbs, tobacco or the like, with a substantially vertical chute, which has at least one lateral opening for a bulk material input, and at least one fan for generating an air stream flowing in the chute against the direction of fall of the input bulk material , characterized in that the region of the bulk material input into the chute has at least one against the conveying direction of the bulk material entering the chute supplying conveyor acting loosening member which in the region of the discharge side end of the conveyor downstream grate and, based on the direction of the vertical air flow in Chute (1), above the grid, is arranged, and that the conveyor is designed as a vibratory conveyor.
  4. Device after Claim 3 , characterized in that each loosening member (9) has at least one comb-like acting computing element.
  5. Device after Claim 4 , characterized in that each comb-like acting computing element is designed as a reel body (10) with radially projecting tines.
  6. Device according to one of Claims 4 and 5 , characterized in that each loosening member (9) has a rotary drive.
DE102008058998.5A 2008-11-25 2008-11-25 Process for the screening or classification of cut, vegetable bulk material, in particular tobacco, and apparatus for carrying out the process Active DE102008058998B4 (en)

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DE102008058998.5A DE102008058998B4 (en) 2008-11-25 2008-11-25 Process for the screening or classification of cut, vegetable bulk material, in particular tobacco, and apparatus for carrying out the process

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DE102008058998.5A DE102008058998B4 (en) 2008-11-25 2008-11-25 Process for the screening or classification of cut, vegetable bulk material, in particular tobacco, and apparatus for carrying out the process

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DE102008058998A1 DE102008058998A1 (en) 2010-06-17
DE102008058998B4 true DE102008058998B4 (en) 2018-11-22

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111707316B (en) * 2020-08-20 2020-12-04 南京大树智能科技股份有限公司 Flexible wind-power wire feeding test equipment and parameter touch method for wind-power wire feeding

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE453358C (en) 1925-09-25 1927-12-05 Kurt Gerson Dipl Ing Device for the separation of components of different specific weights and different sizes of composite material by an air stream
CH517639A (en) * 1971-04-06 1972-01-15 Wild Josef Conveyor system for hay and wilted forage
US4465194A (en) * 1982-12-23 1984-08-14 Universal Leaf Tobacco Co. Threshed tobacco lead separator
DE69712632T2 (en) 1996-10-18 2002-12-05 Beloit Technologies Inc WINDSCREENING SYSTEM WITH AIR CIRCULATION AND ROTATING RAKE FEEDER

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE453358C (en) 1925-09-25 1927-12-05 Kurt Gerson Dipl Ing Device for the separation of components of different specific weights and different sizes of composite material by an air stream
CH517639A (en) * 1971-04-06 1972-01-15 Wild Josef Conveyor system for hay and wilted forage
US4465194A (en) * 1982-12-23 1984-08-14 Universal Leaf Tobacco Co. Threshed tobacco lead separator
DE69712632T2 (en) 1996-10-18 2002-12-05 Beloit Technologies Inc WINDSCREENING SYSTEM WITH AIR CIRCULATION AND ROTATING RAKE FEEDER

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